Research in Progress (RIP) https://rip.trb.org/ en-us Copyright © 2026. National Academy of Sciences. All rights reserved. http://blogs.law.harvard.edu/tech/rss tris-trb@nas.edu (Bill McLeod) tris-trb@nas.edu (Bill McLeod) Research in Progress (RIP) https://rip.trb.org/Images/PageHeader-wTitle-RIP.jpg https://rip.trb.org/ The Use of Recycled Plastic in Asphalt Pavements - Phase II https://rip.trb.org/View/2689392 Tue, 02 Jun 2026 12:25:00 GMT https://rip.trb.org/View/2689392 Reducing Transportation Fire Risk Through Carbon Dot Addition for Diesel Fuels https://rip.trb.org/View/2706036 Sat, 23 May 2026 18:02:38 GMT https://rip.trb.org/View/2706036 Reclamation and Recycling Techniques to achieve Perpetual Pavements Characteristics https://rip.trb.org/View/2703795 Fri, 15 May 2026 17:15:16 GMT https://rip.trb.org/View/2703795 Develop and Demonstrate an Evaluation Process for Acceptance of Additives for Use in Forensic Analysis in Hot Mix Asphalt https://rip.trb.org/View/2666836 Tue, 10 Feb 2026 14:43:18 GMT https://rip.trb.org/View/2666836 Smart Healing in Additively Manufactured Engineered Cementitious Composites Beams for Durable Transportation Infrastructure https://rip.trb.org/View/2665667 Wed, 04 Feb 2026 15:30:44 GMT https://rip.trb.org/View/2665667 Assessing the Durability and Long-Term Performance of Rejuvenated Asphalt Mixes with RAP https://rip.trb.org/View/2646944 Mon, 05 Jan 2026 23:09:53 GMT https://rip.trb.org/View/2646944 Development of Performance Measures for Pothole-Patching Cold Asphalt Mix Materials for Safe and Sustainable Transportation https://rip.trb.org/View/2627349 Wed, 19 Nov 2025 14:17:20 GMT https://rip.trb.org/View/2627349 Increasing Asphalt Recycling to Reduce Paving Costs, Improve Pavement Longevity, and Reduce Environmental Impact https://rip.trb.org/View/2593927 Thu, 28 Aug 2025 11:05:37 GMT https://rip.trb.org/View/2593927 Determine the Optimum Dosage of Rejuvenators Based on the RAP Contents as well as the PG Grade of Recovered RAP Binder https://rip.trb.org/View/2582992 Tue, 05 Aug 2025 16:45:21 GMT https://rip.trb.org/View/2582992 Cracking Resistance of Alaskan Asphalt with RAP Material https://rip.trb.org/View/2512614 Fri, 21 Feb 2025 20:44:37 GMT https://rip.trb.org/View/2512614 Evaluation of RePLAY for Mainline, Shoulders, and Rumbles, Phase II Study: Proprietary Bio-based Fog Sealer and Rejuvenator Reapplication in Clinton County https://rip.trb.org/View/2508963 Wed, 12 Feb 2025 12:00:15 GMT https://rip.trb.org/View/2508963 Superabsorbent Polymers In Concrete to Improve Durability https://rip.trb.org/View/2508876 Mon, 10 Feb 2025 18:40:36 GMT https://rip.trb.org/View/2508876 Improved Pavement Durability and Resiliency Using Balanced Mix Design with High RAP and Rejuvenator: A Path Toward Statewide Implementation https://rip.trb.org/View/2480354 Wed, 01 Jan 2025 16:15:15 GMT https://rip.trb.org/View/2480354 Use of Innovative Sustainable and Durable Materials in Concrete Pavements https://rip.trb.org/View/2479868 Thu, 19 Dec 2024 10:42:42 GMT https://rip.trb.org/View/2479868 Base Stabilization Additives – Effect on Granular Equivalency (GE), Phase II Study: Long-Term Performance Evaluation of Field Demonstration Site https://rip.trb.org/View/2441389 Mon, 14 Oct 2024 14:02:12 GMT https://rip.trb.org/View/2441389